Push button switch



FIG. 1 is a front perspective view of a push button switch according to our novel design;

FIG. 2 is a rear perspective view of a push button switch according to our novel design;

FIG. 3 is a front view of a push button switch according to our novel design;

FIG. 4 is a rear view of a push button switch according to our novel design;

FIG. 5 is a left side view of a push button switch according to our novel design;

FIG. 6 is a right side view of a push button switch according to our novel design;

FIG. 7 is a bottom plan view of a push button switch according to our novel design; and,

FIG. 8 is a top plan view of a push button switch according to our novel design. 

The ornamental design for a push button switch, as shown and described. 